Formaldehyde-DNPH Level 1 (0.1ug/mL) Back Catalog number: 98858 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70345 Propionic acid Price on request 34371 Hexachlorobutadiene, 2000µg/ml in MeOH, 1ml Price on request A13711017AL-100 Flufenacet-ethane sulfonic acid (ESA) sodium, 100µg/mL in Acetonitrile, 1ml Price on request